Casting of reinforced-concrete vessels.



H. ALFSEN,

CASTING 0F REINFORCED CONCRETE VESSELS. APPLICATION FILED FEB. 5. 19m.

Patented Mar. 4,1919

ms NORRIS PEN) -o mlam I run HARALD ALFSEN, OF PORSGRUND, NORWAY,ASSIGNOR TO JOHN MOLLER LARSEN, 0F

CHICAGO, ILLINOIS.

CASTING 0F REINFORCED-CONCRETE VESSELS.

Specification of Letters Patent.

Patented Mar. 4, 1919.

Application filed February 5, 1918. Serial No. 215,550.

.crete Vessels; and I do hereby declare the following to be a full,clear, and exact description of the invention, such as w ll en ableothers skilled in the art to which it appertains to make and use thesame, reference being had to the accompanying drawings, and to lettersor figures of reference marked thereon, which form a part of thisspecification.

The present invention relates to the casting of reinforced concretevessels and the like of the kind which are cast on an interior mold orsheeting in an inverted position and the invention has for its object aprocess which permits the ships deck to be cast in one operation withthe rest of the ships hull, the centering or framework carrying theinterior sheeting being supported on the ground or bottom slab at acertain distance from the same by means of suitable distance pieces.

By means of this arrangement it is possible to put all reinforcementsfor deck and ship hull in place before the casting, whereby the weakjoints between deck and sldes V are avoided.

The bottom slab 0r floor on which the ship is cast at the same timeforms the outside sheeting for the deck, and on this bottom slab isplaced a number of small blocks or supporting pieces for carrying thecentering or frame-work for the interior sheeting, on which the hull iscast. The said blocks or supporting pieces may be manufactured of woodand taken away after the hull is finished, or they may consist of stoneor concrete or the like and be adapted to form a permanent part of thedeck structure. In the latter case the said blocks may be given such aform as to obtain a good hold in the casting.

On the drawing: Figure 1 is a partial longitudinal section of anarrangement according to the invention and Fig. 2 is a cross section ofthe same.

The casting takes place as usual on a supporting slab l of wood orsimilar material, which also forms the outside sheeting for the castingof deck 2. On said supporting slab is placed blocks or bricks 3, theheight of which is equal to the thickness of the deck and said blocks orbricks support the centering or framework carrying the inner moldsheetings, on which the hull is cast. The lower boards 4 of thecentering structure form sheeting for the casting of deck ribs and thelike.

The reinforcement is placed continuously for hull and deck, and thecasting of the whole ship is performed in one operation. When two ormore decks are to be cast the same arrangement may be used, and this isalso the case, if the ship is to be constructed with a double bottom asindicated on Fig. 2. On the lower sheeting 5 for the interior bottom isthen placed blocks or bricks 6 carrying the centering and sheeting forthe exterior bottom.

Claims:

1. A framing for the casting of a concrete ship having a top deck andtransverse strengthening ribs formed in one piece with the sides andbottom, said framing comprising, a' base on which the deck is cast, aplurality of spacing blocks corresponding to the thickness of the deckmounted on the base,

7 bedding blocks in the deck material that have a configuration capableof permanently uniting therewith, said blocks having a heightsubstantially the thickness of the In testimony that I claim theforegoing as deck, mounting transverse frames on said my invention, Ihave signed my name in blocks, casting ribs on the deck between thepresence of two subscribing Witnesses.

frames of a thickness greater than the thick- HARALD ALFSEN. 5 ness ofthe deck and casting the sides and Witnesses:

bottom of the sh1p on sheathing mounted on C. NORMAN,

the frames. .0. FABRICIUS-HANSEN, 7

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

